Chemical Forums
Chemistry Forums for Students => High School Chemistry Forum => Topic started by: TRIENEMYBEST on July 25, 2017, 11:19:13 PM
-
I am planning an experiment on partition coefficients using a separatory funnel. If I try to calculate the partition coefficient of ethanoic acid in water and heptane, will ethanoic acid be more soluble in water or heptane? / Would the molecules of ethanoic acid go more in the water or the heptane?
I would think that it would be more soluble in water as ethanoic acid and water are both polar however I think that ethanoic acid can also dissolve in non-polar solvents, so i'm very confused.
Also how could temperature affect the partition coefficient? I imagine the solubility of ethanoic acid would increase but are there any other effects?
-
I would think that it would be more soluble in water as ethanoic acid and water are both polar however I think that ethanoic acid can also dissolve in non-polar solvents, so i'm very confused.
Pretty much all liquids are miscible to some extent. I agree that it's more likely to dissolve in water than alkane though - can you try (e.g vinegar, water, methylated spirits or similar)
Also how could temperature affect the partition coefficient? I imagine the solubility of ethanoic acid would increase but are there any other effects?
Most liquids increase solubility with increasing temperature, but what you may need to consider is whether the relative solubility changes (so that you can effect a better [or worse] separation).
-
Thank you for replying!
Why would it be more likely to dissolve water then an alkene though? And how could could i find out if the relative solubility changes ?
-
You can increase the Solubility of ethanoic acid in water by adding some NaOH.It will convert ethanoic acid to Sodium ethanoate which is an ionic Compound.
-
And how could could i find out if the relative solubility changes ?
Are heptane and water more or less mutually miscible?
-
You can increase the Solubility of ethanoic acid in water by adding some NaOH.It will convert ethanoic acid to Sodium ethanoate which is an ionic Compound.
True, but as this is an equilibrium between ethanoic acid(aq) ::equil:: ethanoic acid(heptane) won't this be disturbed?
-
And how could could i find out if the relative solubility changes ?
Are heptane and water more or less mutually miscible?
heptane and water are not soluble in water ...water is polar and heptane is non polar.
You can increase the Solubility of ethanoic acid in water by adding some NaOH.It will convert ethanoic acid to Sodium ethanoate which is an ionic Compound.
True, but as this is an equilibrium between ethanoic acid(aq) ::equil:: ethanoic acid(heptane) won't this be disturbed?
Once ethanoic acid is removed as sodium ethanoate in water equilibrium will keep shifting more in the direction of ethanoic acid .
-
Once ethanoic acid is removed as sodium ethanoate in water equilibrium will keep shifting more in the direction of ethanoic acid .
Not false, but possibly veering off-topic a little?